Eight Samsung Securities employees were indicted Monday for selling "ghost" stocks that were mistakenly issued by the company as dividends.

They were under investigation by the prosecution in connection to the stock blunder fiasco that occurred at the brokerage back in April.

According to the Seoul Southern District Prosecutors' Office, the eight indicted are among 21 employees who had been accused of fraudulent trading, breach of trust and violating the Capital Market Act.

Three of the eight will stand trial while being detained as they were found to have sold stocks worth over 20 billion won in dozens of transactions while knowing they were issued by mistake.

The other five were indicted without physical detention. The prosecution said they also conspired in the intentional sale of stocks but their transactions were smaller in volume and fewer in frequency.

Prosecutors either dropped charges or decided to suspend indictments on eleven others who had been under investigation after consideration of their involvement in the case.